/* CSS */
/* Fixed header */
#header {
  position: relative;
  top: 0;
  left: 0;
  right: 0;
  height: 0px;
  transition: top 0.3s;
}

/* Hide header when scrolling down */
.nav-down {
  top: -60px;
}

/* Show header when scrolling up */
.nav-up {
  top: 0;
}